The application requirement of this door panel maintenance method is that the damaged area of the door panel of the automobile body should not exceed 30% of the whole panel, and the internal structure of the panel has not been substantially damaged, so the safety of the automobile body is still guaranteed. It can be found that the door panel maintenance method can obtain better maintenance effect when the automobile body parts are slightly damaged.
In the specific maintenance process, we must pay attention to the finishing treatment of body panels, and check the flatness and concave-convex surface of body panels by grinding.
Among them, the main function of the grinder is to grind the area that needs to be repaired, and the deformation of the plate can be reduced by grinding and cooling at the same time; When the flatness is checked, the high points are filed by the body filing equipment to check the flatness; The maintenance of concave-convex surface is to analyze whether the maintenance part has high convexity, softness and elasticity, and realize maintenance by means of micro-shrinkage.
In the analysis of car body maintenance technology, the appropriate maintenance technology is also selected by studying the different damage conditions of the car body. However, when analyzing the body damage, it is necessary to analyze the damage form of the body with the help of professional testing instruments, and then take reasonable maintenance operation methods to complete the maintenance work.
At present, the traditional instruments for testing automobile body are mechanical universal measuring system and modern new technology, mainly automatic electronic measuring system and a large number of calibrators. Based on electronic measurement technology, ultrasonic transmitter or ultrasonic controller can realize comprehensive inspection of the whole car body.
The application of the ultrasonic measurement system can effectively improve the measurement accuracy of automobile body, and has the advantages of simple operation, high detection efficiency and accurate data. The application principle of electronic measurement technology is to judge the damage and deformation of automobile body through three-dimensional detection of automobile body and analysis of reference plane and center plane of automobile, and provide data support for synchronous maintenance.
Automobile body maintenance technology is mainly divided into shrinkage shaping treatment, wrinkle maintenance treatment and support position reset operation. In the whole maintenance process of car body shrinkage, the plastic deformation damage of car body is mainly treated by the heating effect of welding torch flame, and the heating temperature is determined according to the extension degree of car body damage.
After that, the heated part is tapped to complete the contraction, thus maintaining the car body. In the aspect of body wrinkle treatment, the method of bracing is mainly used to flatten the wrinkle part, and the car can also be disassembled to complete the wrinkle maintenance of the lower part of the body. In this process, the folded part can also be restored by hammering.
For the car body, the support reset operation is mainly to analyze the damage of the car, and use the measurement results to analyze the different deformation results of the car body, so as to determine the specific reverse support force. When the car body is damaged in a large area, professional maintenance work is needed to complete the pulling operation and restore the car body to its original state. In this process, the modified car body stretching operation can be used to restore the original state of the car body, and a better stretching effect can be achieved by pushing while stretching.